van brunt



(No Model.) 2' Sheets-Sheet W A VAN BRUNT GULTIVATOR'OR GRAIN DRILL TOOTH.

Patented Sept. 10, 1895.,

(No ModeL) 2 Sheets-Sheet? W. A. VAN B RUNT.

OULTIVATOROR GRAIN DRILL TOOTH. No. 545,987. Patented Sept. 10, 1895.

Nita TATES. ATENr FFlCE.

WILLARD A. VAN BRUN T, OF HORIOON, WISCONSIN, ASSIGNOR TO THE VAN BRUNT & WILKINS MANUFACTURING COMPANY, OF SAME PLACE...

CULTIVAT'OR OR GRAIN-DRILL TOOTH.

SPECIFICATION forming part of Letters Patent No. 545,987, dated September 10, 1895.

To aZZ whom it may concern;

Be it known that LWILLARD A. VAN BRUNT, a resident of Horicon, in the county of Dodge and State of Wisconsin, have invented certain new and useful Improvements in Cultivator or Grain-Drill Teeth; and I do hereby-declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improvement in cultivators and grain-drills, and more particularly to certain improvements in cultivator or grain-drill teeth such as are adapted to yield when an obstruction is met with and automatically return to their normal or working position when the obstruction shall have been passed, one object of the invention be-.

ing to provide simple means whereby the rigidity or the degree of resistance the tooth will offer without yielding can be quickly and effectually regulated Without the necessity of removing a single bolt or loosening a single nut.

A further object is to so construct the device that the pitch of the tooth can be quickly and easily adjusted without removing or manipulating a single bolt 0r nut.

A further object is to produce efficient means whereby to attach a double-tooth point to the shank in such manner that it can be quickly reversed when one pointshall have become worn or damaged or when it is desired to substitute a toothof different shape.

A further object is to produce an adjustable yielding cultivator or grain-drill tooth which shall be simple in construction, comparatively cheap to manufacture, and which shall be effectual in all respects in the performance of its functions.

With these objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as hereinafter set forth, and pointed out in the claims. j

In the accompanying drawings, Figure 1 is a side elevation partly broken away, showing the application of my improvements. Fig. 2

is an enlarged sectional view. Figs. 3, 4, 5, and 6 are detail views. Fig. 7 is a view showing the manner of adjusting the pitch of the cates.

Application filed June 13,1895. Serial No. 552,697. (roman) tooth. Fig. 8 is a view showing the different anglesat which the shank and tooth may be adjusted.

A represents a drag-bar the members of which are connected together between their ends by means of a bolt (1, which passes through a spacing-bar at, having flanges a at its ends to bear against the respective members of the drag-bar, the latter being connected to the machine in any suitable manner. The lower ends of the members of the drag-bar are curved, and in their lower extremities a shank B is pivotally connected between its ends. The shank B is somewhat widened or thickened near its lower end and made in its forward face with an elongated or oval recess a with which a hole a communi- A reversible or double-pointed tooth O is placed on the forward face of the shank B and provided on its back with an elongated block a adapted to enter the said recess a Theblock a is made in its center with a screw-threaded socket a for the reception of a screw-threaded bolt a passed through the hole a in the shaft. By thus attaching the tooth O to the shank B it can be quickly reversed when one of its points shall have become worn or damaged, or it can be readily removed and replaced by a tooth of different form, if desired.

The upper end of the shank B is enlarged and made with a series of teeth I), whereby to form a toothed segment 0', with which one bar or member D of a jointed brace D is adjustably and pivotally connected, the other member D of said jointed brace being pivotally connected at one end to the bar or' member D and at the other end to the dragbar at a". The bar or member D may be made with a slot a having a cross-bar of at its free end toengage the toothed segment 0', as shown in the drawings; or, if desired, the

shank B may be recessed for the reception of i the bar D, or the bar may be adj ustably connected with the upper end of the shank in some other manner, if desired. The member D? of the jointed brace D could be made in one piece; but I prefer to make it in two parts 0 a, normally spaced apart by means of lugs c and maintained in fixed relation to each other by means of a bolt 0 A pintle c Ice projects laterally from each bar or part c of the member D of the jointed brace and enters suitable perforations at a in the members of the drag-bar A, whereby to pivotally connect said member D to the latter. A coiled spring E is located between the bars or parts 0 of the member D the inner end of said spring being disposed between lugs d, projecting inwardly from said bars 0. The outer end of the spring E is connected with a bolt e, which passes through a block F, disposed between the members of the drag-bar, said bolt also passing through the latter and serving to secure the block F thereto. The block F is preferably made in two partsff, and each part is made with lugs g, between which the bolt e and the outer end of the spring are disposed, said lugs being preferably made with beveled faces or shoulders 7t, against which the spring is adapted to bear. One lug on each part of the block is made with a projection 71, and the other lug of each part of the block is made with a recess 72. the projection on the lug of one part of the block beingadapted to enter the recess in one of the lugs of the other part of the block. The partsff of the blockF are provided at their rear ends with projections t, which abut against each other and form means for the attachment of a chainj, the other end of said chain being attached in a suitable manner to the frame of the machine. An adjustable or revoluble block or stop G, having multiplicity of faces, is eocentrically mounted between the members of the drag-bar A in such position as to bear against the member of the jointed brace D which is connected with the shank B-that is to say, the block G is adapted to bear against the bar or member D of the jointed brace to one side of the pivotal connection between the two members D D of said jointed brace and maintain said members D D 'in greater or less proximity to alignment with each other, accordingly as the block G is turned. Now, it will be seen that when the members D D of the jointed brace are most nearly in alignment with each other the tooth will offer the maximum amount of resistance to an obstruction with which it may come into contact, but that when it meets an obstacle sufficientto overcome this resistance the jointed brace will turn on its pivotal connections, or, in other words, it will in a sense buckle and permit the tooth to yield rearwardly and allow it to pass over the obstruction. Itis evident that if the pivotal connection between the members D D of the jointed brace be moved farther out of alignment with astraight line drawn through the ends of said jointed brace the resistance offered by the tooth would be decreased, and to thus adjust the rigidity or degree of resistance of the tooth is the province of the eccentric-block G, for it is apparent that the pivotal connection between the members of the jointed brace will be thrown more or less out of alignment with the common longitudinal axis of the jointed brace, according to the distance'between the face of the block G which bears against the bar or member D and the axis of said block. The various faces of the block G may be numbered, as shown in Fig. 4, so that the operator may readily adjust the block as desired. The spring E exerts a constant upward pressure on the member D of the jointed brace and consequently on the inner end of the bar or member D, thus normally and constantly pressing the latter against the block G and retaining the opposite end in engagement with the toothed segment 0 of the shank 13. Then it is desired to change the pitch of the shank and tooth carried thereby, this can be readily done by raising the end of the bar or member D of the jointed brace, as shown in Fig. 7, from the toothed segment 0 and place it in engagement with another tooth of the latter, as shown in Fig. 8. As soon as the bar D is out of engagement with the segment 0, the shank B can be readily and quickly turned on itsfulcrum until the desired pitch is reached, when the release of the bar D by the operatorwill cause it to engage the proper tooth of the segment C.

By means of my improvements lam enabled to easily and rapidly makeany adjustments without removing bolts or nuts.

My improvements are exceedingly simple in construction and are effectual in all respects in the performance of their functions.

Various slight changes might be made in the details of construction of my invention without departing from the spirit thereof or limiting its scope, and hence I do not wish to limit myself to the precise details of construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a drag bar, a shank pivoted between its ends thereto and a tooth secured to said shank, of a jointed brace pivoted at one end to the drag bar and pivoted adjustably at its other end to the shank, an eccentric block adapted to bear against one member of the jointed brace and maintain the pivotal connection between the members of the brace more or less out of line with their common longitudinal axis, and a spring secured at its respective ends to the drag bar and the member of the jointed brace pivoted thereto, substantially as set forth.

2. The combination with a drag bar, ashank pivoted between its ends thereto and having a toothed segment at its upper end, and a tooth secu red to said shank, of a jointed brace comprising two members pivotally connected together, one of said members being pivoted to the drag bar and the other pivotally connected in one of the notches of said toothed segment, an eccentric block adapted to bear against the member of the jointed brace which is connected with the toothed segment of the shank, and a spring secured at its respective ends to the drag bar and the member of the jointed brace pivoted thereto, said spring serving toretain the other member of said jointed brace in engagement with said eccentric block, substantially as set forth.

3. The combination with a shank having a recess near its free end and a hole communicating with said recess, of a tooth adapted to lie against the forward face of said shank, a block on the back of said tooth adapted to enter said recess, and a screw removable from the shank and block, said screw passing through said hole in the shank and its threaded end entering a screw-threaded recess in said block, substantially as set forth.

4. The combination with a drag bar, a shank pivoted between its ends thereto, and a tooth carried by said shank, of a jointed brace pivotally connected at its respective ends to the drag bar and the shank, one of the members of said brace comprising two parts secured together and having lugs on their inner faces, a coiled spring having its inner end inserted between said lugs, a block secured to the drag bar against which said spring is adapted to bear, a bolt passing through said block to which the outer end of the spring is secured, and an eccentric block revolubly connected with the dragbar and adapted to bear against onemember of the jointed brace at the side of the pivotal connection between said members nearest the shank, substantially as set forth.

5. The combination with a drag bar, ashank pivoted between its ends thereto and a tooth carried by said shank, of a toothed segment at the upper end of said shank, a jointed brace comprising two members pivoted together, one end of said jointed brace being pivotally connected with said toothed segment and the other member being pivoted to the drag bar, one of the members of said jointed brace comprising two bars secured together, lugs projecting from the inner faces of said bars, a spring disposed between said bars and having its inner end inserted between said lugs, a block secured to the drag bar, a bolt passing through said block to which the outer end of said spring is secured, and an eccentric block revolubly connected with the drag bar and adapted to bear on the member of the jointed brace nearest the drag bar, substantially as set forth.

6. The combination with a drag bar, a shank pivoted between its ends thereto and a tooth secured to said shank, of a jointed brace pivoted at its respective ends to the drag bar and shank, an eccentric block bearing against one of the members of said jointed brace, a sectional, interlocking block secured to the drag bar, a bolt passing through the drag bar and said sectional, interlocking block, shoul ders on said block, and a coiled spring se cured to said bolt and to one of the members of the jointed brace and bearing against said shoulders, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WILLARD A. VAN BRUNT.

Witnesses:

H. MARSH, WM. L. SIMMONS. 

